LETBOND® Two-Component Structural Adhesives
Description
The LETBOND® Two-Component Series consists of high-performance Acrylic-based and Epoxy-based structural adhesives. These systems require precise mixing of two parts to initiate a chemical reaction, resulting in ultra-high strength bonds. Designed for demanding structural applications, they provide excellent adhesion to metals, plastics, ceramics, wood, rubber, and composite materials. They cure at room temperature or can be heat-accelerated to form a bond layer with superior impact resistance and environmental durability.
Acrylic-Based Structural Adhesives: Characterized by rapid curing and excellent tolerance for slightly oily surfaces. Ideal for electronic components and composite structural bonding.
Epoxy-Based Structural Adhesives: Offer exceptional electrical insulation, weatherability, and high-temperature resistance. Widely used in power transmission, mechanical engineering, and composite manufacturing.
Features
- Ease of Use: Most products feature a user-friendly 1:1 mix ratio (by volume) and cure naturally at room temperature after mixing.
- High Strength: Delivers a combination of high tensile strength and superior lap shear strength on metal substrates.
- Environmental Resilience: Provides outstanding resistance to high temperatures, chemicals, solvents, and moisture.
- Broad Compatibility: Specifically engineered to bond most engineering plastics (ABS, PVC, FRP, etc.) and metals (Aluminum, Stainless Steel, Iron).
- Electrical Properties (Epoxy): High volume resistivity and dielectric strength make these ideal for potting and securing electronic/electrical components.
Applications
- Acrylic-Based Series
- 1103: Bonding of motor magnets and transformer components.
- 8760N: Multi-material structural bonding for stainless steel, USB housings, and plastic/metal interfaces.
- 8764 / 8765: High-performance bonding for wind turbine blades, automotive spoilers, sporting goods, and fiberglass (FRP) structures.
- Epoxy-Based Series
- 8761B / 8761C: Metal-to-plastic bonding in loudspeakers; clear versions are suitable for optical applications.
- 8762B / 8762C: Bonding of magnets to PC materials, carbon fiber products, and copper coil assemblies.
- 8763B / 8763C: Rapid-cure versions for electronic and loudspeaker sub-assemblies.
- 8768: High-temperature resistant grade for aerospace metal structural components.
- 8781: Bonding fan blades to iron rings and providing insulation protection for electronic circuits.
Selection Specifications
Acrylic-Based Series
| Model |
Color (A : B) |
Viscosity (cps) (A : B) |
Mix Ratio (Vol.) (A : B) |
Working Time (min) |
Temp. Range (°C) |
|---|---|---|---|---|---|
|
1103 |
Pink / Green |
2,500~3,200 : 2,500~3,200 |
1:1 |
5 |
– |
|
8760N |
White / (Blue & Green & Purple) |
95k～100k : 90k～95k |
1:1 |
10 |
-29~82 |
|
8764 |
Off-white / Amber |
30k～100k : 50k～120k |
1:1 |
5~7 |
-40~180 |
|
8765 |
Off-white / Amber |
30k～100k : 50k～120k |
1:1 |
12~14 |
-40~180 |
Epoxy-Based Series
| Model |
Color (A : B) |
Viscosity (cps) (A : B) |
Mix Ratio (Vol.) (A : B) |
Working Time (min) |
Hardness (Shore) |
Temp. Range (°C) |
|---|---|---|---|---|---|---|
|
8761B |
Black / Clear |
10k～12k : 10k～12k |
1:1 |
30 |
D 80 |
-40~80 |
|
8761C |
Clear / Clear |
10k～12k : 10k～12k |
1:1 |
30 |
D 80 |
-40~80 |
|
8762B |
Black / Pale Yellow |
30k～50k : 25k～45k |
1:1 |
45 |
D 75 |
-40~100 |
|
8762C |
Milky / Amber |
30k～50k : 25k～45k |
1:1 |
45 |
D 85 |
-60~100 |
|
8763B |
Black / Amber |
10k～12k : 10k～12k |
1:1 |
3 |
D 91 |
-40~80 |
|
8763C |
Pale Yellow / Amber |
10k～12k : 10k～12k |
1:1 |
3 |
D 91 |
-40~80 |
|
8781 |
Clear / Amber |
8k～11k : 8k～12k |
1:1 |
5~10 |
D 70±5 |
-20~100 |
Notes:
- The values above are for reference only; actual values are based on the Certificate of Analysis (COA) of the shipped batch.